[FIX] pos_online_payment: Add missing phone number to kwargs

Current behavior:
When you try to pay with razorpay, you got an error saying the phone
number was missing.

Steps to reproduce:
- Setup RazorPay
- Set a phone number on admin
- Go to the POS
- Add a product to the cart
- Click on the payment button
- Select razorpay
- Scan the QRCode with your phone (make sure you'r connected on the
  admin account)
- Try to finalize the payment

opw-3669600

closes odoo/odoo#152040

Signed-off-by: Vlad Stroia (vlst) <vlst@odoo.com>

addons/pos_online_payment/controllers/payment_portal.py

@@ -194,6 +194,7 @@ class PaymentPortal(payment_portal.PaymentPortal):
         # Avoid tokenization for the public user.
         kwargs.update({
             'partner_id': partner_sudo.id,
+            'partner_phone': partner_sudo.phone,
             'custom_create_values': {
                 'pos_order_id': pos_order_sudo.id,
             },